LED Ghosting

LED Ghosting

May 18th, , 2:43pm

Moonleds supply professional and honest service.

 

It seems there are two fixes 1) Use a dimmer with neutral capacity or 2) Fit a special capacitor across the load. But this means several capacitors would be needed - one for each light fitting!  These are not cheap either.

Question...Is it a case now in the UK that having a neutral at the wall switch is a common wiring practice? I have always seen and used loop in wiring at the ceiling rose with just line and switched line being at the wall switch.  To add a neutral and a specal dimmer would involve a lot of work rewiring, chasing walls and the special dimmer costs!  Hardly any saving then!!  

Or am I missing something??

Using a dimmer and LED lamps I often find the LED lamps produce so called 'Ghosting' when Off. i.e. they glow slightly. Today, my 25watt LED R7s tube arrived and was fitted to a Daughter and Child floor standing up lighter in place of the 150watt Halogen tube, in an attempt to save energy/money! But LED ghosting occurred. The same happened when I replaced two parallel wired ceiling light lamp fittings with LED lamps instead of the 6 x 40 watt filament lamps. Here I have had to replace one LED lamp in each fitting with a standard filament lamp, which immediately stopped the ghosting effect. See topic here https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num= It seems there are two fixes 1) Use a dimmer with neutral capacity or 2) Fit a special capacitor across the load. But this means several capacitors would be needed - one for each light fitting! These are not cheap either.Is it a case now in the UK that having a neutral at the wall switch is a common wiring practice? I have always seen and used loop in wiring at the ceiling rose with just line and switched line being at the wall switch. To add a neutral and a specal dimmer would involve a lot of work rewiring, chasing walls and the special dimmer costs! Hardly any saving then!!Or am I missing something??

This is just a 0.47uF X1 310VAC rated capacitor. Electronic dimmers without neutral connections need a return path when the light bulb (load) is off to power the circuit inside the dimmer. This capacitor provides a lower impedance return path for the dimmer to bypass the bulb when "off" which reduces or eliminates LED ghosting. If you are not using a dimmer with a neutral, don't have a neutral available in dimmer location, or do not want to pay for a dimmer that uses a neutral this is a good solution. If there is no neutral at the dimmer location you will need to install this capacitor across the load (the light bulb socket). It is important to note this capacitor is designed to eliminate ghosting not to fix a poor LED and dimmer combination that is producing flickering but it can help with that in some cases.

If you want to learn more, please visit our website led diode dip.

Luke S

5.0 out of 5 stars

It's a simple capacitor and it works to eliminate LED ghosting

Reviewed in the United States on October 3,

This is just a 0.47uF X1 310VAC rated capacitor. Electronic dimmers without neutral connections need a return path when the light bulb (load) is off to power the circuit inside the dimmer. This capacitor provides a lower impedance return path for the dimmer to bypass the bulb when "off" which reduces or eliminates LED ghosting. If you are not using a dimmer with a neutral, don't have a neutral available in dimmer location, or do not want to pay for a dimmer that uses a neutral this is a good solution. If there is no neutral at the dimmer location you will need to install this capacitor across the load (the light bulb socket). It is important to note this capacitor is designed to eliminate ghosting not to fix a poor LED and dimmer combination that is producing flickering but it can help with that in some cases.

Images in this review

For more China SMD LED supplierinformation, please contact us. We will provide professional answers.